https://www.irjet.net/archives/V9/i7/IRJET-V9I7102.pdf

1. © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 538
Compressive strength of M40 and M50 grade concrete using metakaolin
as admixture
Batham Geeta1, Akhtar Saleem2, Rajesh Bhargava3
1PhD Scholar, UIT-RGPV, Bhopal, India,
2 Professor, UIT-RGPV, Bhopal, India,
3 Professor, RGPV, Bhopal, India.
-------------------------------------------------------------------------***-----------------------------------------------------------------------
ABSTRACT- In this research program, high volume ultra-fine fly ash concrete mixes produced with OPC 53 grade cement for
higher grade M40 and M50. Initially control mix was produced with 100 % OPC cement. Further cement content was reduced by
ultra-fine fly ash and Metakaolin and properties were found. The Metakaolin were used in, 10%, 15% and 20 % to enhance the
concrete properties and. In such a way overall cement content was reduced up to 60 %. Replacement of cement by UFFA with
Metakaolin results in more improved and economical concrete.
Keywords - Ultra-fine fly ash, metakaolin, ordinary portland cement, concrete, compressive strength
INTRODUCTION
Christy et al. [1] investigated the effect of class-F fly ash for partial replacement of cement and fine aggregate in cement
mortar for three different ratios 1:3, 1:4.5 and 1:6. Result showed increase in compressive strength for cement replacement
for 1:3 and 1:4.5 mortars and for sand replacement to 1:6 mortar. Satish H. Sathawane et al. [2] conducted experimental
study to investigate combined effect rice husk ash and fly ash for cement replacement up to 30 %. Result shows that
compressive strength increases by 30.15% in compared with targeted strength and reduces by 8.73% compared with control
concrete. Guoqiang Xu et al. [3] investigated the influence of combined admixture of super-fine lime stone powder and low
quality fly ash on mortar. Test result indicated that the mortar fluidity increases with increase in the super-fine stone powder.
The maximum flexural strength and compressive strength was found 9.8 MPa and 42.2 MPa respectively with 33.3% of
limestone powder. Ravande Kishore al. [4] conducted experimental study to investigate the mechanical properties of high
strength concrete by replacing ordinary portland cement by 5%, 10% and 15% Rice Husk Ash for grade M40 and M50 The
optimum replacement of rice husk ash found to be 10% in both the grades of the concrete. Papayianniet al. [5] produced
high-strength using high volumes of industrial by-products in laboratory mixtures. The by-products used are high-calcium
(HC) fly ash and ladle furnace (LF) slag as binders and electric arc furnace slag as aggregates. Investigation reported mixtures
containing both supplementary cementitious materials and slag aggregates the produced concrete shows high-strength (>70
MPa), good abrasion resistance and fracture toughness. Krishna Murthy N et al. [6] designed a simple tool for SCC with high
reactive metakaolin and fly ash as an admixture for cement replacement. They provide detailed steps for mix design with 29%
of coarse aggregate with three cement replacement ratio 5-20%(by MK), 10-30% (by FA) and different % combination of
MK+FA. Authors developed a user friendly mix design tool which is capable of calculating all quantities required in the mix
design.
II OBJECTIVE OF THE STUDY
The research was aimed to investigate effect of metakaolin on 7, 28, 56 and 90 days compressive strength for grade M40 and
M50
III MATERIALS AND THEIR PROPERTIES
Cement
OPC 53 grade cement of Ultra tech was used for this research program.
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 09 Issue: 07 | July 2022 www.irjet.net p-ISSN: 2395-0072

2. © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 539
Natural Sand
Locally procured natural sand was used as fine aggregate in concrete. Locally available Narmada sand (zone-II) was used
Aggregate
A combination of 20mm nominal size aggregate and 10mm nominal size aggregate is used as coarse aggregate in this
experimental program. Both types of coarse aggregate were locally procured.
Water
The water used was ordinary tap water from the Bhopal city.
Ultra-Fine Fly ash
Fly ash used in this study was collected from Sarni thermal power plant.
Metakaolin
Commercially available Bags of Metakaolin were used in various proportions in this study.
IV. EXPERIMENTAL PROGRAM
To conduct experimental program various trials were prepared using metakaoline and ultrafine-fly ash for grade M40, M50
and M60.
V. RESULTS AND DISCUSSION
Fig. (5.1 and 5.2) shows compressive strength of concrete containing metakaolin combined with ultra. Fine fly ash as
admixture for grade M40 and M50 Respectively.
Fig. 5.1 Compressive strength at 7 days, 28 days, 56days and 90 days for grade M40 with10%,15% and 20% metakaolin
It is observed from the fig.1.1 that replacement of cement using UFFA with metakaolin results in reduction in compressive
strength initially. But thereafter there is significant improvement in performance of compressive strength. Compressive
31
50.3 51.25 52.8
18
23.35
30.49
39.16
34.29
39.81
47.17
56.12
34.92
39.63
45.91
53.53
0
10
20
30
40
50
60
7 days 28 days 56 days 90 days
Compressive strength of M40 garde of concrete
using 10%, 15% and 20% metakaolin as admixture
(Mpa)
M00 M41 M42 M43
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 09 Issue: 07 | July 2022 www.irjet.net p-ISSN: 2395-0072

3. © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 540
strength for control mix (M00) were found 31.00, 50.30, 51.25 and 52.80 N/mm2 at the age of 7 days, 28 days, 56 days and 90
days. It was found that compressive strength of concrete mix M41with 40%FA and 10%M was lower as compared to M42 with
45%FA and15%M and M43 with 40%FA and20%M) %. Maximum percentage of increment in compressive strength for mix
M42 and M43 was found 6.28 % and 1.42 % at the age of 90 days as compared to control mix.
Fig. 5.2 Compressive strength at 7 days, 28 days, 56days and 90 days for grade M50 with10%,15% and 20% metakaolin
Compressive strength for control mix (M00) were found 42.10, 60.20, 61.46 and 62.48 N/mm2 at the age of 7 days, 28 days, 56
days and 90 days. It is indicated from the fig.5.2 that compressive strength at the age of 7 days and 90 days shows excellent
improvement for grade 50. Maximum percentage of increment in compressive strength for mix M51, M52, and M53 were
found 2.51%, 0.27% and 8.01% respectively at the age of 90 days when compared with control mix.
VI CONCLUSION
Various concrete mixes were produced in the lab using ultra-fine fly ash (40 to 45 %) in combination with metakaolin (10 %,
15% and 20%) for M40 and M50. Control mix with 100 % OPC were caste and tested in the laboratory. Combination of UFFA
and Metakaolin shows excellent improvement in compressive strength for both grade. Maximum percentage of increment in
compressive strength was found 6.28 % and 8.01% as compared to control mix at 90 days for M40 and M50 grade
respectively. Concrete produced with combination of UFFA and Metakaolin can be used in different civil engineering
structures, beam, column, foundations and other construction work. It can be also used in high-rise building, tall structure,
road pavement etc.
REFRENCES
[1] C Freeda Christy & D tensing, “Effect of class-F fly ash as partial replacement with cement and fine aggregate in mortar”,
Indian Journal of Engineering and Material Science, Vol 17, April 2010 pp 140-144.
[2] Satish H. Sathawane, Vikrant S. Vairagade and Kavita S Kene “Combine Effect of Rice Husk Ash and Fly Ash on Concrete by
30% Cement Replacement”, Procedia Engineering, Science Direct, vol.51 ( 2013 ) pp35 – 44.
[3] Guoqiang Xu, Zhiguo You, Lin Gao and Dianli Han, “ The Influence of Combined Admixture on Super-Fine Limestone
Powder and Low Quality Fly Ash on the Performance of Cement Mortar” , Technical paper, Advanced Material Research , Vol.
652-654 (2013) pp 1181-1184, Trans Tech Publications, Switzerland.
42.1
60.2 61.46 62.48
46.26
50.76
56.76
64.05
49.43 52.77
57.23
62.65
45.6
51.14
58.53
67.49
0
10
20
30
40
50
60
70
80
7 days 28 days 56 days 90 days
Compressive strength of M50 grade conctrete using
10%, 15% and 20% metakaoline as admixture (MPa)
M00 M51 M52 M53
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 09 Issue: 07 | July 2022 www.irjet.net p-ISSN: 2395-0072

4. © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 541
[4] Ravande Kishore, V.Bhikshma and P.Jeevana Prakash, “Study on Strength Characteristics of High Strength Rice Husk Ash
Concrete”, Procedia Engineering, Science Direct Vol. 14 (2011) pp 2666–2672.
[5] I. Papayianni, E. Anastasiou “Production of high-strength concrete using high volume of industrial by-products”,
Construction and Building Materials, Vol. 24 (2010) pp1412–1417.
[6] Krishna Murthy N., Narsimha Rao A. V., Ramana Reddy I. V. and Vijay Sekhar Reddy M., “Mix Design procedure for self-
compacting concrete”, IOSR Journal of Engineering , Vol. 2 (9) pp 33-41, 2012.
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 09 Issue: 07 | July 2022 www.irjet.net p-ISSN: 2395-0072